Photonics in Russia: state and challenges. Part II Requirement of the emerging industrial markets of the early withdrawal of high-tech products led to the creation of a separate industrial photonics industry in Russia. The first part of the review has showed the structure of the industry, the current state and the problems hindering its development, which are characteristic of all domestic high-tech, were considered. A business that has been strengthened through the use of the results of this industry should take the bulk of the funding for applied research and development on the industry, leaving the state only funding for fundamental and individual prospecting work on photonics and its applications, as well as purely defense tasks. The second part of the review discrabes priorities and challenges facing the industry in Russia. Their solution will allow to use the high potential inherent in photonics.
Operation Features of Machine for Micro Milling of Large- Size Flat Optical Parts The article presents the main design features of the machine for micromilling of large-sized flat optical parts. The technological process and features of machiningh are described. The results of processing a large-sized parts from aluminum alloy AMg6 and potassium dihydrogenphosphate KDP are given.
Determination of the Parameters of the Laser Hardening of Steels and Their Tribological Features The laser hardening operation is intended to replace nitriding technologies with a depth of 0.3–0.4 mm and cementation with a layer depth of 1.0–1.1 mm. The objectives of the work were to determine the influence of the defocusing of a fibre laser beam on the depth and width of the laser hardening zones. According to the regression equations, calculations are performed and compared with the results of the experiment.
Ultraviolet Laser Cutting Ultraviolet lasers have a number of advantages in the market of microcutting of metallic and nonmetallic materials. The stability and reliability of laser instruments combined with machining accuracy and low mechanical stresses allow these lasers to enter the microelectronic manufacturing market. Due to the flexibility in working with a wide range of materials, the UV lasers easily adapt to the requirements of technological processes and are integrated into fast and accurate laser processing lines in the production of microelectronics. The possibilities of solid-state UV-lasers with diode pumping with radiation at a wavelength of 355 nm are given in the article.
Comparative Analysis of Laser Systems for the Micro-Processing of Materials A comparative analysis of the parameters of pulsed lasers and copper vapor laser systems (CVL and CVLS) with other types of gas and solid-state lasers and their industrial applicability in the field of material processing. It is shown that CVL with radiation wavelengths of 510.6 and 578.2 nm, nanosecond pulse duration and a light spot with a diameter of up to 20 μm with a peak power density of 10 to 9 degrees -10 to 11 degrees W / cm2 are unique tools for efficient and high-quality micromachining of almost any metal and a wide range of nonmetallic materials.
Computational Methods for Estimating the Degree of Danger of Multi-Wave Laser Radiation Laser products that generate laser radiation at the same time at several wavelengths are widely used in both civil and military fields of activity. Hygienic standardization of multi-wave laser radiation has its own specifics. The formulas for calculating the maximum permissible levels of radiation, regulated in the domestic laser safety regulations, are not sufficiently correct. The article presents evidence of the need to make changes to existing documents on laser safety.
Problems of Measuring Irradiance in the Process of Laser Metal Treatment The method for controlling irradiance from scattered and reflected laser radiation in the course of laser processing of metals implemented in a dosimeter implies measuring the irradiance of the operator’s workplace space only in processes with a fixed beam. Modern laser technologies are based on high-speed movements of laser beams; therefore, previously developed methods for monitoring laser irradiance parameters require fundamentally new approaches to methods of dosimetric monitoring. The article presents data on the specifics of measuring the irradiance of reflected and scattered laser radiation in the processing of metals with a moving laser beam and
discusses possible solutions to the problems encountered.
Traffic Interception in Optical Network: Informative Parasitic Electromagnetic Radiation The paper presents an analysis of the possibility of forming an informative radio band signal in optical networks on the basis of non-linear optical generation of difference frequencies. On the basis of a simplified physical model of traffic interception in optical networks with amplitude modulation, power estimates of the informative parasitic electromagnetic radiation are obtained. The model and estimates show the reality of remote traffic interception in optical networks. The most dangerous parts of the optical network and some methods of increasing the efficiency of interception are discussed. Also, methods of traffic protection by technical means are offered.